Wez's car is probably a good example to work on.. Yes ECU's are different and we can all say MOTEC's are better in some ways than others... IT all depends what you are happy with.. MY AEM does run well but it wasnt a five minute job.. I closely monitor off boost driving, the cruisablity and off boost driving is about spot on now.. and i can get 30 odd to the gallon "off boost" if i take it easy i.e 85 on the motorway with stoich values of around 14.1 to 14.7 on a cycle..
It all depends what you want, Do you want a race car or a fast street car... The same goes down to the choice of turbo and components to support what you want...